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sched/cpuacct: Add cpuacct_init()
So we don't open-coded initialization of cpuacct in core.c. Signed-off-by: Li Zefan <lizefan@huawei.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/51553687.1060906@huawei.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -6936,12 +6936,8 @@ void __init sched_init(void)
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#endif /* CONFIG_CGROUP_SCHED */
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#ifdef CONFIG_CGROUP_CPUACCT
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root_cpuacct.cpustat = &kernel_cpustat;
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root_cpuacct.cpuusage = alloc_percpu(u64);
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/* Too early, not expected to fail */
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BUG_ON(!root_cpuacct.cpuusage);
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#endif
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cpuacct_init();
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for_each_possible_cpu(i) {
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struct rq *rq;
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@ -218,6 +218,13 @@ void cpuacct_charge(struct task_struct *tsk, u64 cputime)
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rcu_read_unlock();
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}
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void __init cpuacct_init(void)
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{
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root_cpuacct.cpustat = &kernel_cpustat;
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root_cpuacct.cpuusage = alloc_percpu(u64);
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BUG_ON(!root_cpuacct.cpuusage); /* Too early, not expected to fail */
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}
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struct cgroup_subsys cpuacct_subsys = {
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.name = "cpuacct",
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.css_alloc = cpuacct_css_alloc,
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@ -41,10 +41,15 @@ static inline struct cpuacct *parent_ca(struct cpuacct *ca)
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return cgroup_ca(ca->css.cgroup->parent);
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}
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extern void cpuacct_init(void);
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extern void cpuacct_charge(struct task_struct *tsk, u64 cputime);
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#else
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static inline void cpuacct_init(void)
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{
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}
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static inline void cpuacct_charge(struct task_struct *tsk, u64 cputime)
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{
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}
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